Counterbalance.



C. P. MARS-HALL'.

' couNT'EmsALANcE.

APPLICATION FILED DEC. II. |916 VPrimer, .asl shown byfull lines in Fig. 1,l

whileffondighte'r-wveights.thespring is d'egssed through the medium of the screw 19, s descr1bed.`\ The -adyustmen't of spring 17 i5 further effected by a sliding band or ring y, 20. which encircled the spring and the free 'endof arm 16. The full and dot-ted lines in Figf'l *show 'the Vadjustable 'nature of the band20.' 'A

,For thewell'knoivn Victrola talking nia-- chines a s li htl imodified counter-balance isrequii'ed; eerring to Figs. 6, 7, and-8,

the dotted'. lines 21 4represent the outline of the usual goose-neck which is, pifvotedto thev tonearm 3|"on the free end 21 of-which fa. rep'roducer` like the partV 4 may be yap-` plied. The counterfbalanceconsists 'fthe spring 17', the cur-ved free end` 'of which passes beneath the free engi i l of the gooseneckf 21,:-whi1e the opposi e lend of said 'figured to the underside of a supportingplate 22,' as at; 22"-, The support 22 is pro- 'fffvided on its underside witha saddle y23, which rides. 'upon thep rtion 3 of the tone :Lf-arm, and 24+24 rep'r sente spring claws or l portion 3". -for .hol

laseprovidealthr .-@clips which'partially encircle and grip the finfg the 'support- 22 in Tov further secur'ethe support v22,

oted to one of l'claws 24E', as at 26. The

latch 25 is -also provided with ,which engages-a similar tooth ing .th'` atcli in closed .p os'ition-beneat11 the screiv'19carriedlby-,the supports 22 is eln- -ployed for depress-ing.tlieyfree end-of the spr1ng-.17l,"for reducing'itsfpower for liftin v the. gooseeneck ..forjj compensating for lig ter weights `\\hic h the sai`d` p art.y The iulliind dotted` lines in l. f-Fig. Tf-show 'how the spring" 1T. may be ad dusting band or ring. 20uencireles the spr-ing 17fafnd a portion-offtheplate.- 22 andl is 4f the -latch comprises a han-4 aiya? be appliedto slidable toward vand from screw 19 fiorini'- ther vin-yingthev tension or power `of 'the said spring.

v In Fig. 9'- is shown a modification of the Counter-weight illustrated in,Fig. Y1, Wherein `'a swinging arm-16 vis 'provided with a pair of vlugs 28, between which 'is pivoted al lever 29 .having at 011e end afork 29"' forv engaging the underside 'of a tone arm (as '3), Whlle the otherend portionis provide-d with ya weightf), which is slidable'toward and from'the pivot point, as shown by full .and dotted lines .in Fig.; 9, for. balancing heavier or lighter weights. The forked end 29 of the lever 29 may or may vnot be iiexible like the springs 174117.

In Figs. 1, 6, and 7 I have shown the springs 17-17- applying their tension. or

power to the tone arms, butit is understood .that the said Springs mayjengage th?l vreperroducers or other v'related parts. and o rm the same functlons or services.v I Havlng thus descr1bed my-1nvent1on,w hat I claimas new and desire-to secure byv Letpower of the spring, 2.1111 a weightfcompen'sator fortalking machines, `the combination with the tone arm, of ya rigid support securedwto a ortion of 'said arm, means for adjustingjsaldlvsupport so that its movement may correspond to the movements of the tonearm, a balancing spring secured to said support and exerti-ngits power forjuplifting the :free end of they tone arm, and means for increasing and decreasing the power of sald sprmg.

In testimonywhereof Ilalix my slgnature.

'CHAR- LES MAR-SHALL: 

